| 无硅TRIP钢力学性能的研究 |
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| 引用本文： | 李壮,吴迪,王佳夫.无硅TRIP钢力学性能的研究[J].东北大学学报(自然科学版),2005,26(5):452-455. |
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| 作者姓名： | 李壮 吴迪 王佳夫 |
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| 作者单位： | 东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004;东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004;东北大学,轧制技术及连轧自动化国家重点实验室,辽宁,沈阳,110004 |
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| 摘 要： | 无硅TRIP钢采用临界区加热等温淬火热处理,获得铁素体,贝氏体及大量稳定残余奥氏体的三相组织·通过对其显微组织观察,断口形貌分析,与高硅TRIP钢力学性能的相互比较,探讨了无硅TRIP钢相变诱发塑性的行为·结果表明:无硅TRIP钢在拉伸变形过程中,应变诱导相变,相变诱发塑性;其拉伸断口形貌呈韧性断口特征;经790℃加热在400℃等温5min时,抗拉强度达到754MPa,延伸率达到36%,综合性能(强塑积)达到27144MPa%的最高值·
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| 关 键 词： | 无硅TRIP钢 临界区等温淬火 残余奥氏体 应变诱导相变 相变诱发塑性 |
| 文章编号： | 1005-3026(2005)05-0452-04 |
| 修稿时间： | 2004年8月12日 |
Study on Mechanical Properties of Si-Free TRIP Steel |
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| LI Zhuang,WU Di,WANG Jia-fu.Study on Mechanical Properties of Si-Free TRIP Steel[J].Journal of Northeastern University(Natural Science),2005,26(5):452-455. |
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| Authors: | LI Zhuang WU Di WANG Jia-fu |
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| Institution: | (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China |
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| Abstract: | Bainite, ferrite and a large amount of stably retained austenite were obtained through austempering immediately after intercritical annealing of Si-free TRIP steel. The behaviour of TRIP (transformation-induced plasticity) effect was discussed through observing microstructure, analyzing fracture morphology and comparing it with the mechanical properties of high-Si TRIP steels. The results showed that Si-free TRIP steel has the excellent mechanical properties due to strain-induced martensite transformation which forms TRIP of retained austenite when it is strained, and its fracture morphology presents toughness characteristics. The tensile strength, total elongation and strength-ductility balance property of such Si-free TRIP steel all reach their maximum values (754 MPa, 36% and 27144 MPa%, respectively) when it is heated at 790°C and then held at 400° for 5 min. |
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| Keywords: | Si-free TRIP steel austempering after intercritical annealing retained austenite strain-induced martensite transformation transformation-induced plasticity |
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